USB Mouse HID example?

[brainstorm]

Perhaps based on some combination of the following resources:

https://gitlab.com/TheZoq2/hotas
https://github.com/TeXitoi/keyseebee/blob/master/firmware/src/main.rs
https://github.com/agalakhov/usbd-hid-device-example/blob/master/src/main.rs
https://github.com/atsamd-rs/atsamd/blob/master/boards/itsybitsy_m0/examples/twitching_usb_mouse.rs
https://github.com/jamesmunns/OtterPill-rs/blob/master/split-mouse/src/main.rs
https://github.com/jamesmunns/OtterPill-rs/tree/master/hello-mouse

I have been trying with a STM32F042 IC over here (can't figure out why the USB device is not enumerating at the time of writing this):

https://gist.github.com/brainstorm/5affbf3689dec0c0f03d550a95200dfd

[TeXitoi]

I can confirm that the linked code keyseebee is functional, tested yesterday on real hardware on a stm33f072.

[brainstorm]

Argh, sorry @TeXitoi, didn't mean to say yours does not work ;)

After trying to add hprintln! my gist example went:

  = note: rust-lld: error: section '.rodata' will not fit in region 'FLASH': overflowed by 12 bytes
          rust-lld: error: section '.rodata' will not fit in region 'FLASH': overflowed by 36 bytes
          rust-lld: error: section '.rodata' will not fit in region 'FLASH': overflowed by 36 bytes

As a result, I'm just reading Ferrous systems announcements now:

https://ferrous-systems.com/blog/21st-century-embedded-tooling/
https://ferrous-systems.com/blog/probe-run/
https://ferrous-systems.com/blog/knurling-rs/

Learning, catching up and chasing (minimal) examples I can use right away for my usecase, that's all ;)

[TeXitoi]

I didn't know if it works 24h ago ;-) and I said to someone on matrix that it was untested, so I just clarify that I now know that it works.

Don't use hprintln, it's really too slow and will kill USB timing. Also, it will just not work without a debug probe plugged.

Use --release, default debug build are almost unusable on embedded because of code bloat (size of the generated code) and it's really slow (by more that 10 times).

[korken89]

An USB example would be a great addition.
I do not have any relevant USB experience, but maybe someone feels up to the task? :)

[jkristell]

I have a remote controlled USB mediakeyboard example here. https://github.com/jkristell/infrared-examples/blob/master/stm32f103-bluepill/examples/mediakeyboard.rs

A bit rough, but it does work with Linux. If I find the time I will try to make it act as a usb mouse as well.

[AfoHT]

I have a remote controlled USB mediakeyboard example here. https://github.com/jkristell/infrared-examples/blob/master/stm32f103-bluepill/examples/mediakeyboard.rs

A bit rough, but it does work with Linux. If I find the time I will try to make it act as a usb mouse as well.

Cool!

Please create a PR if you find the time, always nice with many examples of usage.